2005 25RKS Jay Flight Shrill Ringing Sound

[Marmul]

Our trailer is parked next to our home went not in use. We woke up this morning to a high pitched ringing sound coming from the trailer. Dismantled the smoke alarm and it wouldn't stop. Disconnected battery behind propane tanks and it stopped. Currently electrical not plugged in because not in use. This is our 3rd season with trailer. Not too much use yet. What is causing that ringing? Still learning....Thanks for any suggestions!

[OurJayco]

Because you are not plugged in to shore power or 120 volts, your alarms and detectors are running off your battery. The battery level is low and causing your detector to ring. Check your battery level and you will find that it is below 11 volts.

[norty1]

The battery has parasitic drains that will discharge it. The sound is a low volt alarm the smoke detector or co2 alarm puts out.
Charge the battery and disconnect the battery when stored to prevent it.